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Unformatted text preview: Wed. 4-2-08 Remainder of IB 138 18 lect. Slots remaining (incl today) Skip chs: 6, 7, 8, 9 (read ch10) I will give 11 lectures (1 for midterm) Remaining 6 allocated to you 47 students = 15trios and one pair 3 x 15min presentations per lecture slot = 5.5 lectures Each person is expected to stand up and talk for 5mins. Final will have material from the presentations Start thinking about partners NOW. I will ask for names of groups by Mon. Apr. 7 th , or I will allocate. Subject matter can be of your choosing (or Norris ch 6-9) News items, outrageous claims (or not), dietary supplements in pharmacies, environmental endocrinology, pheromones, etc. MUST include reference to primary literature Presentation dates will be after next midterm (April 14 th ) --April 30, May 2, 5, 7, 9, 12.------------------------------------------------------------------------------------------------------------------ α-MSH (melanotropin) in Non-mammals Vertebrate pigmentation changes are often correlated with environmental condition or life-history stage (weasel) Some pigmentation changes are rapid (neural), others are slower (endocrine); some are regulated in both ways. All are regulated by chromatophores Remember chamaflouge changes occur for social interactions as well as to avoid prey. Chromatophores--are pigment-containg and light-reflecting cells. They are generated in the neural crest during embryonic development. Mature chromatophors are grouped into subclasses based on their color under white light: Xanthophores (yellow) Erythrophores (red) Idiophones (reflective/iridescent) Leucopoiesis (white)...
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